<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <title>css响应式卡片</title>
    <style type="text/css">
    body {
        margin: 25px;
    }
    
    div.polaroid {
        width: 80%;
        background-color: white;
        box-shadow: 0 4px 8px 0 rgba(0, 0, 0, 0.2), 0 6px 20px 0 rgba(0, 0, 0, 0.19);
        margin-bottom: 25px;
    }
    
    div.container {
        text-align: center;
        padding: 10px 20px;
    }
    </style>
</head>

<body>
    <h2>响应式卡片</h2>
    <div class="polaroid">
        <img src="rock600x400.jpg" alt="Norway" style="width:100%">
        <div class="container">
            <p>The Troll's tongue in Hardanger, Norway</p>
        </div>
    </div>
    <div class="polaroid">
        <img src="lights600x400.jpg" alt="Norway" style="width:100%">
        <div class="container">
            <p>Northern Lights in Norway</p>
        </div>
    </div>
</body>

</html>
